Detachable end for augers or bits



Jan. 1, 1924 1,479306 Y. P. LEGER DETACHABLE END FOR AUGERS 0R BITS Filed June 9. 1922 f7? m nia) E1072 1. 14

film ng Patented Jan. 1, 192

entree STATES rava es PATENT rates.

YVON P. LEGER, F MEMRAMCOOK, NEW BRUNSWICK, CANADA, ASSIG-NOR OF ONE- FOUBTH .TO LUGIEN' MELANSON, OF MONCTON, .NEW BRUNSWICK, CANADA.

DETACHABLE END FOR AUG-EES OR BITS.

I Application filed June 9, 1922. Serial No. 567,227.

To all whom it may concern:

Be it known that I, Yvon P. Leena, a subject of the King of Great Britain, residing at Memramcook, Province of New Brunswick, Canada, have invented certain new and useful Improvements in Detachable Ends for Angers or Bits; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a new and useful detachable end for augers or bits.

The primary object of the invention is to provide a cutting end which may be applied to an auger or hit or to a specially constructed spiral member. Angers and bits that have an integral cutting end can be filed or sharpened only a limited number of times and must then be discarded. In accordance with the present invention, the renewable end may be sharpened until useless, and when it is discarded there is less waste than would occur in rejecting an entire auger or bit merely because the cutting end has become worn out.

Further objects and advantages of the invention will appear as the description continues.

In the accompanying drawings in which is illustrated a preferred embodiment of the invention:

Figure 1 is a perspective view of the renewable cutting end applied to a spiral member Figure 2 is a side elevation;

Figure 3 is a similar view taken at the rear side of Figure 2;

Figure 4: is an end View;

Figure 5 is a section on the line Figure 2;

Figure 6 is a side view of the detachable end;

Figure 7 is a similar view taken at the opposite side of Figure 6; and,

Figure 8 is a side view of the spiral member.

Referring to the accompanying drawings by reference characters, the so called spiral member consists of a shank 10 having formed thereon a spiral 11. The end of the spiral member is squared as at 12, and is provided with a hole 13 and a point 14. The spiral may further be provided with as many additional holes 15 as may be desired or necessary. A tenon 16 is formed on the spiral fora purpose hereafter to be pointed out.

The renewable tip consists of a spiral ribbon 17 of substantially the same external diameter as the spiral 11, and having an internal diameter equal to that of the shank 10 so that the latter may be received in the longitudinal axis of the spiral ribbon. This ribbon terminates at its outer end in a cut ting lip 18, while opposite this lip is formed an additional cutting lip 19 which in cooperation with the screw point 20 constitute the cutting end of a bit or auger. Obviously various types of cutting ends may be formed on the spiral ribbon 17. There are provided in the ribbon threaded openings 21 and 22 adapted for registration with the holes 13 and 15 respectively. In the spiral ribbon is also formed a groove 23 which co operates with the tenon 16 as a locking device. Screws 24 are passed through the reg istering holes, as clearly shown in Figure 2.

If desired, the ends of the screws may project beyond the faces of the spires of the spiral 11 and be provided at these ends with nuts. A notch 25 is provided in the end of the additional cutting lip 19 and receives the point 14 of the squared end 12, previously referred to. As additional securing means, holes 26 may be formed through the lip 19 and through the point 14, whereby these members may be joined by means of a screw or bolt passed through these holes, as previously described.

While a specific form of the invention has been illustrated and described, it is to be understood that various alterations in the construction may be resorted to without de parting from the scope of the appended claim.

Having thus fully described the invention, what I claim as new and desire to protect by Letters Patent is I A device of the character described comprising a spiral member having a blank end, a separate spiral ribbon adapted for engagement on the end of said spiral member, said ribbon terminating in a cutting lip, and a screw point formed atthe working end of said ribbon.

In witness whereof I have hereunto set my hand. Q

, YVON P. LEGER. 

